Design of stiffened panels for stress and buckling via topology optimization

Chu, Sheng, Featherston, Carol ORCID: https://orcid.org/0000-0001-7548-2882 and Kim, H. Alicia ORCID: https://orcid.org/0000-0002-5629-2466 2021. Design of stiffened panels for stress and buckling via topology optimization. Structural and Multidisciplinary Optimization 64 , pp. 3123-3146. 10.1007/s00158-021-03062-3

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Abstract

This paper investigates the weight minimization of stiffened panels simultaneously optimizing sizing, layout, and topology under stress and buckling constraints. An effective topology optimization parameterization is presented using multiple level-set functions. Plate elements are employed to model the stiffened panels. The stiffeners are parametrized by implicit level-set functions. The internal topologies of the stiffeners are optimized as well as their layout. A free-form mesh deformation approach is improved to adjust the finite element mesh. Sizing optimization is also included. The thicknesses of the skin and stiffeners are optimized. Bending, shear, and membrane stresses are evaluated at the bottom, middle, and top surfaces of the elements. A p-norm function is used to aggregate these stresses in a single constraint. To solve the optimization problem, a semi-analytical sensitivity analysis is performed, and the optimization algorithm is outlined. Numerical investigations demonstrate and validate the proposed method.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License
Publisher:	Springer
ISSN:	1615-147X
Funders:	EPSRC
Date of First Compliant Deposit:	25 October 2021
Date of Acceptance:	18 August 2021
Last Modified:	06 Jan 2024 04:39
URI:	https://orca.cardiff.ac.uk/id/eprint/144987

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